Mol Gen Genomics. Several approaches could be used to distinguish these genes, including linkage studies, gene perturbation studies i. Figure Environmental sex determination in reptiles: Ecology, evolution, and experimental design.
Differentiation and development of testis in the oviparous lizard, Calotes versicolor Daud. Sign In See Subscription Options. This paradigm, though, has been recently challenged, with new evidence now emerging that there may indeed be both sex chromosomes and temperature involved in the sex determination of some reptile species.
Trends Biochem Sci. Hermaphrodite Intersex Disorders of sex development Sex reversal.
In this species, individuals pile up on top of one another to form a mound Figure Trends Endocrinol Metab. Thus, the distinction between GSD and TSD in reptiles is not as dramatic as some have argued [for a more detailed discussion of this subject see Sarre et al.
Sex Dev. Conversely, just because a gene is not differentially expressed between incipient testes and ovaries does not mean it is not involved in sex determination. The eggs are affected by the temperature at which they are incubated during the middle one-third of embryonic development.